30:T77b,FIDE_CHESS = [ {name: 'pawn', symbol: '♟', moves: [ {leap: [-1,-1], effect: 'stomp', requires: 'enemy'}, {leap: [ 0,-1], effect: 'move', requires: 'empty'}, {leap: [ 1,-1], effect: 'stomp', requires: 'enemy'}, {slide: [ 0,-1], range: 2, effect: 'move', requires: 'empty', first: true}, ]}, {name: 'knight', symbol: '♞', moves: [ {leap: [-2,-1], effect: 'stomp'}, {leap: [-1,-2], effect: 'stomp'}, {leap: [ 2,-1], effect: 'stomp'}, {leap: [ 1,-2], effect: 'stomp'}, {leap: [-1, 2], effect: 'stomp'}, {leap: [-2, 1], effect: 'stomp'}, {leap: [ 1, 2], effect: 'stomp'}, {leap: [ 2, 1], effect: 'stomp'} ]}, {name: 'rook', symbol: '♜', moves: [ {slide: [ 1, 0], range: Infinity, effect: 'stomp'}, {slide: [ 0, 1], range: Infinity, effect: 'stomp'}, {slide: [-1, 0], range: Infinity, effect: 'stomp'}, {slide: [ 0,-1], range: Infinity, effect: 'stomp'} ]}, {name: 'bishop', symbol: '♝', moves: [ {slide: [ 1, 1], range: Infinity, effect: 'stomp'}, {slide: [-1, 1], range: Infinity, effect: 'stomp'}, {slide: [-1,-1], range: Infinity, effect: 'stomp'}, {slide: [ 1,-1], range: Infinity, effect: 'stomp'} ]}, {name: 'queen', symbol: '♛', moves: [ {slide: [ 1, 0], range: Infinity, effect: 'stomp'}, {slide: [ 0, 1], range: Infinity, effect: 'stomp'}, {slide: [-1, 0], range: Infinity, effect: 'stomp'}, {slide: [ 0,-1], range: Infinity, effect: 'stomp'}, {slide: [ 1, 1], range: Infinity, effect: 'stomp'}, {slide: [-1, 1], range: Infinity, effect: 'stomp'}, {slide: [-1,-1], range: Infinity, effect: 'stomp'}, {slide: [ 1,-1], range: Infinity, effect: 'stomp'} ]}, {name: 'king', symbol: '♚', moves: [ {leap: [-1,-1]}, {leap: [-1, 0]}, {leap: [-1, 1]}, {leap: [ 0,-1]}, {leap: [ 0, 1]}, {leap: [ 1,-1]}, {leap: [ 1, 0]}, {leap: [ 1, 1]} ]} ]31:T473,COLORBOUND_CLOBBERERS = [ {name: 'bede', moves: [ {slide: [ 1, 1], range: Infinity}, {slide: [-1, 1], range: Infinity}, {slide: [-1,-1], range: Infinity}, {slide: [ 1,-1], range: Infinity}, {leap: [ 2, 0]}, {leap: [ 0, 2]}, {leap: [-2, 0]}, {leap: [ 0,-2]} ]}, {name: 'waffle', moves: [ {leap: [ 1, 0]}, {leap: [ 0, 1]}, {leap: [-1, 0]}, {leap: [ 0,-1]}, {leap: [ 2, 2]}, {leap: [-2, 2]}, {leap: [-2,-2]}, {leap: [ 2,-2]} ]}, {name: 'fad', moves: [ {leap: [ 1, 1]}, {leap: [-1, 1]}, {leap: [-1,-1]}, {leap: [ 1,-1]}, {leap: [ 2, 2]}, {leap: [-2, 2]}, {leap: [-2,-2]}, {leap: [ 2,-2]}, {leap: [ 2, 0]}, {leap: [ 0, 2]}, {leap: [-2, 0]}, {leap: [ 0,-2]} ]}, {name: 'cardinal', moves: [ {slide: [ 1, 1], range: Infinity}, {slide: [-1, 1], range: Infinity}, {slide: [-1,-1], range: Infinity}, {slide: [ 1,-1], range: Infinity}, {leap: [-2,-1]}, {leap: [-1,-2]}, {leap: [ 2,-1]}, {leap: [ 1,-2]}, {leap: [-1, 2]}, {leap: [-2, 1]}, {leap: [ 1, 2]}, {leap: [ 2, 1]} ]} ]32:T440,SHOGI = [ {name: 'shogi pawn', moves: [ {leap: [ 0,-1]} ]}, {name: 'shogi knight', moves: [ {leap: [-1,-2]}, {leap: [ 1,-2]} ]}, {name: 'lance', moves: [ {slide: [ 0,-1], range: Infinity} ]}, {name: 'gold general', moves: [ {leap: [-1,-1]}, {leap: [-1, 0]}, {leap: [ 0,-1]}, {leap: [ 0, 1]}, {leap: [ 1,-1]}, {leap: [ 1, 0]} ]}, {name: 'silver general', moves: [ {leap: [-1,-1]}, {leap: [-1, 1]}, {leap: [ 0,-1]}, {leap: [ 1,-1]}, {leap: [ 1, 1]} ]}, {name: 'dragon king', moves: [ {leap: [-1,-1]}, {leap: [-1, 1]}, {leap: [ 1,-1]}, {leap: [ 1, 1]}, {slide: [ 1, 0], range: Infinity}, {slide: [ 0, 1], range: Infinity}, {slide: [-1, 0], range: Infinity}, {slide: [ 0,-1], range: Infinity} ]}, {name: 'dragon horse', moves: [ {leap: [-1, 0]}, {leap: [ 0,-1]}, {leap: [ 0, 1]}, {leap: [ 1, 0]}, {slide: [ 1, 1], range: Infinity}, {slide: [-1, 1], range: Infinity}, {slide: [-1,-1], range: Infinity}, {slide: [ 1,-1], range: Infinity} ]} ]33:T8c6,{ const CELLSIZE = 24 return html` ${ $each(boards)`

${b => b.piece.name}

` }` }34:[] 2e:{"title":"Fairy chess pieces","cells":[{"id":0,"value":"md`# Fairy chess pieces`","pinned":false,"hidden":false,"mode":"ojs"},{"id":42,"value":"md`A diagram that describes the legal moves for each piece of chess in a few common chess variants.`","pinned":false,"hidden":false,"mode":"ojs"},{"id":4,"value":"$30","pinned":false,"hidden":false,"mode":"ojs"},{"id":180,"value":"BASIC_BETZA = [\n {name: 'ferz', moves: [\n {leap: [ 1, 1]},\n {leap: [-1, 1]},\n {leap: [-1,-1]},\n {leap: [ 1,-1]}\n ]},\n {name: 'alfil', moves: [\n {leap: [ 2, 2]},\n {leap: [-2, 2]},\n {leap: [-2,-2]},\n {leap: [ 2,-2]}\n ]},\n {name: 'wazir', moves: [\n {leap: [ 1, 0]},\n {leap: [ 0, 1]},\n {leap: [-1, 0]},\n {leap: [ 0,-1]}\n ]},\n {name: 'dabbaba', moves: [\n {leap: [ 2, 0]},\n {leap: [ 0, 2]},\n {leap: [-2, 0]},\n {leap: [ 0,-2]}\n ]}\n]","pinned":false,"hidden":false,"mode":"ojs"},{"id":188,"value":"$31","pinned":false,"hidden":false,"mode":"ojs"},{"id":211,"value":"NUTTY_KNIGHTS = [\n {name: 'charging rook', moves: [\n {slide: [ 1, 0], range: Infinity},\n {slide: [-1, 0], range: Infinity},\n {slide: [ 0, -1], range: Infinity},\n {leap: [-1, 1]},\n {leap: [ 0, 1]},\n {leap: [ 1, 1]}\n ]},\n {name: 'fibnif', moves: [\n {leap: [ 1, 1]},\n {leap: [-1, 1]},\n {leap: [-1,-1]},\n {leap: [ 1,-1]},\n {leap: [-1,-2]},\n {leap: [ 1,-2]},\n {leap: [-1, 2]},\n {leap: [ 1, 2]}\n ]},\n {name: 'charging knight', moves: [\n {leap: [-1, 0]},\n {leap: [-1, 1]},\n {leap: [ 0, 1]},\n {leap: [ 1, 0]},\n {leap: [ 1, 1]},\n {leap: [-2,-1]},\n {leap: [-1,-2]},\n {leap: [ 2,-1]},\n {leap: [ 1,-2]}\n ]},\n {name: 'colonel', moves: [\n {leap: [-1,-1]},\n {leap: [-1, 1]},\n {leap: [ 0, 1]},\n {leap: [ 1,-1]},\n {leap: [ 1, 1]},\n {slide: [ 1, 0], range: Infinity},\n {slide: [-1, 0], range: Infinity},\n {slide: [ 0,-1], range: Infinity},\n {leap: [-2,-1]},\n {leap: [-1,-2]},\n {leap: [ 2,-1]},\n {leap: [ 1,-2]}\n ]}\n]","pinned":false,"hidden":false,"mode":"ojs"},{"id":235,"value":"$32","pinned":false,"hidden":false,"mode":"ojs"},{"id":181,"value":"pieces = Array.prototype.concat(FIDE_CHESS, BASIC_BETZA, COLORBOUND_CLOBBERERS, NUTTY_KNIGHTS, SHOGI)","pinned":false,"hidden":false,"mode":"ojs"},{"id":252,"value":"boards = {\n const BOARDSIZE = 7\n const CENTER = [(BOARDSIZE-1)/2, (BOARDSIZE-1)/2]\n var bds = []\n \n pieces.forEach(piece => {\n // initialize an empty board\n var board = d3.range(BOARDSIZE).map(_ => d3.range(BOARDSIZE).map(_ => ({piece: null, moves: []})))\n // place an \"instance\" of the piece at the center\n board[CENTER[0]][CENTER[1]].piece = piece\n // place a cursor for each square that can be reached by the piece\n piece.moves.forEach(d => {\n if(d.leap !== undefined) {\n board[CENTER[0]+d.leap[0]][CENTER[1]+d.leap[1]].moves.push(d)\n }\n if(d.slide !== undefined) {\n var position = [CENTER[0], CENTER[1]]\n d3.range(Math.min(d.range, (BOARDSIZE-1)/2)).forEach(i => {\n position[0] += d.slide[0]\n position[1] += d.slide[1]\n board[position[0]][position[1]].moves.push(d)\n })\n }\n })\n \n bds.push({board: board, piece: piece})\n })\n \n return bds\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":6,"value":"$33","pinned":true,"hidden":false,"mode":"ojs"},{"id":7,"value":"md`## Dependencies`","pinned":false,"hidden":false,"mode":"ojs"},{"id":13,"value":"import {$each, $if} from \"@nitaku/sugar-strings\"","pinned":false,"hidden":false,"mode":"ojs"},{"id":11,"value":"d3 = require('d3-array')","pinned":false,"hidden":false,"mode":"ojs"}],"files":"$W34","stdlib":"1","titling":"auto"}